I'm pretty sure it's the ignitor (AKA Ignition element Xenon-light) that I need.
part # 63126907504
My passenger side HID went. Already purchased new bulbs, and didn't work. Already swapped ballast left to right, and still not working. I guess this is the only part left
2002 BMW 325xi, BOSCH AL headlights, Bi-Xenon.
Let me know if anyone has one.